Audio amplifier



FIG. 1 is a perspective view of an audio amplifier showing our newdesign;

FIG. 2 is a top plan view thereof;

FIG. 3 is an end elevational view thereof as seen from the lefthand endof FIG. 1;

FIG. 4 is an end elevational view opposite to that of FIG. 3;

FIG. 5 is a side elevational view as seen from the righthand side ofFIG. 3;

FIG. 6 is a side elevational view as seen from the lefthand side of FIG.3; and,

FIG. 7 is a bottom plan view thereof.

The ornamental design for an audio amplifier, as shown and described.